Covariate balance is the extent to which the distribution of covariates is similar across the intervention groups.
Standardized mean differences
The Standardized Mean Difference (SMD) represents a standardized difference in mean between contrasted intervention groups for each covariate.
|
|
Means intervention group
|
Means control group
|
Standardized mean difference
|
|
distance
|
0.89839344
|
0.89700714
|
0.125175777
|
|
age_cd
|
11.59381714
|
11.58271865
|
0.003749979
|
|
sex_cd
|
1.46657914
|
1.48366702
|
-0.031811299
|
|
residence_area_cd731
|
0.13965147
|
0.14646997
|
-0.019671111
|
|
residence_area_cd732
|
0.14108379
|
0.12961012
|
0.032960105
|
|
residence_area_cd733
|
0.71926474
|
0.72391992
|
-0.010359603
|
|
institutionalized_blTRUE
|
0.02781093
|
0.02950474
|
-0.010301042
|
|
foreign_blTRUE
|
0.15170685
|
0.12961012
|
0.061596004
|
|
pregnancy_blTRUE
|
0.01181666
|
0.02107482
|
-0.085675800
|
|
essential_worker_blTRUE
|
0.02757221
|
0.02845100
|
-0.005366853
|
|
comorbidities_blTRUE
|
0.45977560
|
0.47523709
|
-0.031023533
|
|
immunestatus_blTRUE
|
0.28037718
|
0.26343519
|
0.037717288
|
|
|
Means intervention group
|
Means control group
|
Standardized mean difference
|
|
distance
|
0.50016888
|
0.49983112
|
0.036925901
|
|
age_cd
|
11.68012685
|
11.66701903
|
0.004448472
|
|
sex_cd
|
1.47420719
|
1.47843552
|
-0.007892363
|
|
residence_area_cd731
|
0.13594080
|
0.14164905
|
-0.016655434
|
|
residence_area_cd732
|
0.14630021
|
0.13615222
|
0.028714750
|
|
residence_area_cd733
|
0.71775899
|
0.72219873
|
-0.009864130
|
|
institutionalized_blTRUE
|
0.02706131
|
0.02684989
|
0.001302932
|
|
foreign_blTRUE
|
0.15031712
|
0.15031712
|
0.000000000
|
|
pregnancy_blTRUE
|
0.01162791
|
0.01310782
|
-0.013804665
|
|
essential_worker_blTRUE
|
0.02684989
|
0.02896406
|
-0.013079094
|
|
comorbidities_blTRUE
|
0.45539112
|
0.45687104
|
-0.002971682
|
|
immunestatus_blTRUE
|
0.27526427
|
0.27547569
|
-0.000473341
|
Variance ratios
The variance ratio (VR) represents the ratio of the variance in the contracted intervention groups for each covariate. A VR close to 1, implies that variances are similar in the compared groups and as such indicates good covariate balance.
|
|
Var. Ratio
|
|
distance
|
0.7576281
|
|
age_cd
|
0.9708949
|
|
sex_cd
|
0.9875230
|
|
residence_area_cd731
|
NA
|
|
residence_area_cd732
|
NA
|
|
residence_area_cd733
|
NA
|
|
institutionalized_blTRUE
|
NA
|
|
foreign_blTRUE
|
NA
|
|
pregnancy_blTRUE
|
NA
|
|
essential_worker_blTRUE
|
NA
|
|
comorbidities_blTRUE
|
NA
|
|
immunestatus_blTRUE
|
NA
|
|
|
Var. Ratio
|
|
distance
|
0.9813426
|
|
age_cd
|
0.9948747
|
|
sex_cd
|
1.0082098
|
|
residence_area_cd731
|
NA
|
|
residence_area_cd732
|
NA
|
|
residence_area_cd733
|
NA
|
|
institutionalized_blTRUE
|
NA
|
|
foreign_blTRUE
|
NA
|
|
pregnancy_blTRUE
|
NA
|
|
essential_worker_blTRUE
|
NA
|
|
comorbidities_blTRUE
|
NA
|
|
immunestatus_blTRUE
|
NA
|
Propensity score distribution